Trait OptionDiffDomain 

pub trait OptionDiffDomain {
    type Domain: Domain<State = Self::State, Diff = Option<Self::State>>;
    type State: Clone;

    // Provided methods
    fn get_cur_state(
        state_diff: StateDiffRef<'_, Self::Domain>,
    ) -> &<<Self as OptionDiffDomain>::Domain as Domain>::State { ... }
    fn get_cur_state_mut(
        state_diff: StateDiffRefMut<'_, Self::Domain>,
    ) -> &mut <<Self as OptionDiffDomain>::Domain as Domain>::State { ... }
}

In case your domain has a Diff that is an Option of its State, provides helper functions to retrieve the state in your tasks.

The functions get_cur_state and get_cur_state_mut are available when read-only, respectively read-write, access is required. In that case, just use the trait in your task files: use npc_engine_utils::OptionDiffDomain;.

Required Associated Types

type Domain: Domain<State = Self::State, Diff = Option<Self::State>>

type State: Clone

Provided Methods

fn get_cur_state( state_diff: StateDiffRef<'_, Self::Domain>, ) -> &<<Self as OptionDiffDomain>::Domain as Domain>::State

Returns either the diff if it is not None, or the initial_state.

fn get_cur_state_mut( state_diff: StateDiffRefMut<'_, Self::Domain>, ) -> &mut <<Self as OptionDiffDomain>::Domain as Domain>::State

Returns either the diff if it is not None, or copies the initial_state into the diff and returns it.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<S: Debug + Sized + Clone + Hash + Eq, DA: Debug + Default, D: Domain<State = S, Diff = Option<S>, DisplayAction = DA>> OptionDiffDomain for D

type Domain = D

type State = <D as Domain>::State